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Space Tech Lab Super Tube Rectifier Arrived! (Read 70799 times)
HockessinKid
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #450 - 01/30/25 at 19:25:48
 
Found the 5x20 fuse in the STR-1002 IEC. Looks like it's ceramic not clear glass so I can't tell if it's blown. Anyone know the amp value on the fuse, I can't read it.

HK
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Nottingham Interspace TT > Modwright PH 9.0XT phono preamp OR MWI modded Cambridge CNX V2 > CSP3-25th Ann. preamp > STL STR-1002 Super > ZMA-25th Ann. amp > PI Audio UberBUSS > Caintuck Audio Lii15 Magnum speakers > SDFB's > SA AUVA's > SRA & ZenWave cables
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Tony
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #451 - 01/30/25 at 20:08:48
 

I sent AL some questions while he is on vacation last week, and he did respond so I'm sure you will hear back from him.

Sorry to hear that you encountered a glitch. I have the STR-1002-Super, and AL wrote and told me "The default fuse is 20mm 1.25A, you can use range from 1A to 2A."

Let me know if you have any additional questions that I might be able to answer. When I had a problem, the 845 tubes still lit, but the fuse in the 84UFO25 failed.

Tony



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HockessinKid
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #452 - 01/30/25 at 20:19:20
 
Thanks Tony. Did he specify fast or slow blow?

HK
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Nottingham Interspace TT > Modwright PH 9.0XT phono preamp OR MWI modded Cambridge CNX V2 > CSP3-25th Ann. preamp > STL STR-1002 Super > ZMA-25th Ann. amp > PI Audio UberBUSS > Caintuck Audio Lii15 Magnum speakers > SDFB's > SA AUVA's > SRA & ZenWave cables
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Tony
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #453 - 01/30/25 at 20:52:07
 

Did he specify fast or slow blow?

HK, in writing to me he did not specify.
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will
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #454 - 01/30/25 at 23:56:08
 
HK, Don't know if you have one around, but multi testers tend to have a continuity setting with a sound setting. In the case of a fuse, we would measure between the ends, and if there is continuity, it is not broken and you hear a sound. And if it is blown, no sound. I find them handy for a lot of things, used similarly for verifying the right wiring of power cable or IC ends, or checking house voltage, DC voltage, cap and resistor values, etc.

If you don't have one, I saw a cheapy on amazon with lots of happy ratings for like $14, and these days you can get some pretty nice ones for not a lot more... And who knows, I did not read up on it, but this one may be pretty accurate.
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Hearafter
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #455 - 01/31/25 at 02:39:12
 
HK-  Fyi- My Str-104 came with a 1A Slow Blow fuse for the main power.  No internal fuses.  If you look at the fuse end markings a T is Slow and F is Fast.  That’s if you can read the small letters and numbers. So my fuse reads T1A 250v.  Hope it’s just the fuse.


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kulafu
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #456 - 01/31/25 at 14:34:37
 
Here is a response Al sent me for fuse replacement for an STR1002:
Thanks for asking, the fuse in there is 1.25A 20mm slow blow, you can use 1A~1.5A slow blow if you cannot find 1.25A, or 1.5 fast blow.

Bob

   
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kulafu
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #457 - 01/31/25 at 14:39:17
 
I got the fuses from Amazon:  1.25A 250V Slow-Blow Glass Fuses 5x20mm (Pack of 5).  I had the same no power problem and Al pointed me first to the fuse.
Bob
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Altec 604 8K, Liionidas Silver 10/W-15,UFO25th/Cary SET Monos/,CSP3 25th/Holo May KTE or STL DSD512 ,HQP/USB/Pulse/LHY SW10, Roon/Thorens 1600(Decware ICs, speaker wires/Equi=Core 1800, SFDBs and STR-1002
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HockessinKid
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #458 - 01/31/25 at 15:00:11
 
Thanks all. Al responded and said a 1.25A or 2A slow blow fuse would work. Suggested I try a 2A given the larger power supply. Ordered both from Amazon and should be able get it back up and running on Monday.

HK
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Nottingham Interspace TT > Modwright PH 9.0XT phono preamp OR MWI modded Cambridge CNX V2 > CSP3-25th Ann. preamp > STL STR-1002 Super > ZMA-25th Ann. amp > PI Audio UberBUSS > Caintuck Audio Lii15 Magnum speakers > SDFB's > SA AUVA's > SRA & ZenWave cables
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HockessinKid
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #459 - 02/03/25 at 16:37:43
 
Thankfully it was the fuse that blew. The stock Linlai 805 tubes are burning brightly and now I have several 1.5 and 2 amp ceramic fuses if I encounter another power hiccup. Thanks again for all the assistance.

More music streaming after the tubes warm up a bit😊.

HK
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Nottingham Interspace TT > Modwright PH 9.0XT phono preamp OR MWI modded Cambridge CNX V2 > CSP3-25th Ann. preamp > STL STR-1002 Super > ZMA-25th Ann. amp > PI Audio UberBUSS > Caintuck Audio Lii15 Magnum speakers > SDFB's > SA AUVA's > SRA & ZenWave cables
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CAJames
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #460 - 02/03/25 at 17:28:36
 
That is good news. I've been #mercurycurious but have held off because of our cats. But the various issues that folks had with the mercury rectifiers has dampened my enthusiasm by a lot.
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Tony
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #461 - 02/03/25 at 18:29:14
 

HK, that is good news.  Back to the music.

CAJames, I experimented last night listening to a pair of 845's and then a pair of 872A (mercury) and the better sound was from the 872A. You have some other tubes in your inventory that would compete much better, so there may not be much to be gained with the 872As.
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CAJames
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #462 - 02/03/25 at 20:21:35
 
Quote:
Posted by: Tony      Posted on: Today at 10:29:14

...CAJames, I experimented last night listening to a pair of 845's and then a pair of 872A (mercury) and the better sound was from the 872A...


You are not alone, hence #mercurycurious. But, my Elrog 845s do sound better than my (inexpensive) Chinese triodes. I (infamously) said my system sounded so good it was hard to imagine the STR making it better, so I'll never say never, but today I'm happy listening to music and I'm not worrying about tubes.
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[FOOBAR2000 | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos
Omega SAM , Hifiman Arya, Audeze LCD-XC
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GroovySauce
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #463 - 02/03/25 at 23:55:09
 
HK, Glad you got back up and running again!

Tony, What are you running the STR on? I found for amps the 845s don't sound as good as the 3B22s. Actually putting a pair of rectifiers into the STR and running that sounds better than the same tubes in the amp.

For the TRP DAC I found the 845s sound great. I've been racking up hours on a pair of Linlai 805-T and they are sounding very nice. I've swiched a few things around so need to go back to the 845s after I get some more time with the 805s.

I'm guessing once the component requires a certain amount of current the 845s and other triodes quickly run out of steam and don't sound as good.

I'm still staying away from the mercury tubes.
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CAJames
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #464 - Yesterday at 01:53:05
 
Quote:
Posted by: GroovySauce      Posted on: Today at 15:55:09

...Actually putting a pair of rectifiers into the STR and running that sounds better than the same tubes in the amp...


Yes, I found the same thing. But for me, in my non-Decware preamp, running 5V rectifiers (and/or 300B tubes) in the STR was a relatively small improvement vs. the 10V transmitting triodes that were a blow-me-away improvement.
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[FOOBAR2000 | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos
Omega SAM , Hifiman Arya, Audeze LCD-XC
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Tony
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #465 - Yesterday at 03:03:52
 
"What are you running the STR on?" GS, I'm not sure what you mean by that question! Smiley

My first set of STR tubes were 805, 211 and 845. Then I went with the 3B22, 866A and 872A. In my system, the 872A have outperformed all the others by a fairly large margin. The 3B22 and 866A are about the same, and I like them.

I am going directly from the STR into the 300B.

At some point I need to get back and listen again to the first group as it has been awhile.
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HockessinKid
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #466 - Yesterday at 11:32:17
 
The Linlai 845 DG's are back in my STR-1002. The music just sounds exquisite in my system configuration. Picking up a used Snake River Audio Signature Series power cord to see if I can extract even more good mojo from this sterling performer.

HK
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Nottingham Interspace TT > Modwright PH 9.0XT phono preamp OR MWI modded Cambridge CNX V2 > CSP3-25th Ann. preamp > STL STR-1002 Super > ZMA-25th Ann. amp > PI Audio UberBUSS > Caintuck Audio Lii15 Magnum speakers > SDFB's > SA AUVA's > SRA & ZenWave cables
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CAJames
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #467 - Yesterday at 15:46:23
 
Quote:
Posted by: HockessinKid      Posted on: Today at 03:32:17

The Linlai 845 DG's are back in my STR-1002. The music just sounds exquisite in my system configuration...


Of my Chinese triodes: Linlai DG 845 and 211 and the stock 805s, I preferred the 845. But I also tried a lot of different tubes in my (non-Decware) preamp to get the right synergy. I'm wondering if you've also been rolling tubes in your CSP?
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[FOOBAR2000 | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos
Omega SAM , Hifiman Arya, Audeze LCD-XC
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GroovySauce
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #468 - Today at 00:32:01
 
Tony, you answered my questions. What was being powered by the STR.

Tony running the STR into the Sarah and CAJames STR into CSP, seems like my hypothesis is still holding.

It might be good for us when discussing which tubes we like to mention what component we are powering with the STR.

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HockessinKid
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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #469 - Today at 09:21:08
 
[I'm wondering if you've also been rolling tubes in your CSP?]

CA James,

I have a matched pair of Cryotone 6922's in the output sockets and a single 1950's RCA 6SN7GT smoked glass tube in the input socket. I dial back the RCA a couple clicks.

HK
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Nottingham Interspace TT > Modwright PH 9.0XT phono preamp OR MWI modded Cambridge CNX V2 > CSP3-25th Ann. preamp > STL STR-1002 Super > ZMA-25th Ann. amp > PI Audio UberBUSS > Caintuck Audio Lii15 Magnum speakers > SDFB's > SA AUVA's > SRA & ZenWave cables
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